Question

What is the `H^+` concentration for an aqueous solution with pOH of 4.31 at 25°C?

Answer 1

Well, clearly `pH=9.69`

Explanation:

Why clearly? Because `pOH+pOH=14` in aqueous solution under standard conditions....

And so ....

`[H_3O^+]=10^(-9.69)*mol*L^-1=2.04xx10^-10*mol*L^-1`.